Hugh Pickens writes writes: "The Miami Herald reports that US Ambassador to Mexico Carlos Pascual has resigned following weeks of withering criticism by Mexican President Felipe Calderon, who said he'd lost trust in the envoy and demanded his removal marking the first high-level US diplomat to quit as a result of the release of sensitive US diplomatic cables by WikiLeaks. Calderon repeatedly voiced frustration and anger at US diplomatic cables from Pascual and diplomats serving under him that questioned whether Calderon's anti-crime strategy would succeed and criticized the effectiveness of Mexican security agencies. Secretary of State Hillary Clinton voiced "great regret" in announcing Pascual's resignation, saying he'd been an effective "architect and advocate for the U.S.-Mexico relationship" and said Pascual had sustained morale of US agents and diplomats in Mexico as they have increasingly fallen into the line of fire. It is highly unusual for a foreign leader to be so outspoken in demanding the removal of a US diplomat as Calderon has been in recent weeks — and equally rare that such demands would be met."